JPH04250225A - Pedal locking construction of pedal-type operation device on back hoe - Google Patents

Abstract

PURPOSE:To prevent misoperation of pedal by forming the cross section shape of right and left pedal of pedal-type operation device in a condition inclined upward at both ends, and installing the pedals in such a manner as to freely oscillate like a seesaw with a shaft being the center. CONSTITUTION:Pivotally mounted brackets 15, 16 are vertically installed at the center of back surface of right and left pedals 13, 14 of a pedal-type operation device 11. The pivotally mounted bracket 15, 16 are pivotally installed in such a manner as to freely oscillate by installing a shaft 19 between support brackets 17, 18 mounted on a floor 12. An operation rod 20 is vertically installed so that it is pivotally installed to the shaft 19, and the lower end of operation rod 20 is connected to a hydraulic valve portion. Thus, the direction of depressing right and left pedals agrees with the rotating direction of main boom, by which misoperation of right and left pedals can be prevented.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pedal lock structure for a pedal-type actuating device in a backhoe.

0002

[Prior Art] Conventionally, a pedal-type actuating device for turning the main boom of an excavation rig left and right has been disclosed in Japanese Patent Application Laid-Open No. 51-829.
As shown in Japanese Patent No. 03, an aircraft is disclosed in which a foot pedal is provided on the aircraft body so that it can swing in the left and right directions.

[0003] Another conventional example is Utility Model Application No. 58-
As shown in Publication No. 15229, this is a structure of a driving part of a work vehicle equipped with a pedal that can be depressed forward or backward across a stop position, and is swingable around an axis that is in a direction different from the swing axis of the pedal. A driving part structure of a working vehicle, in which a pedal lock member is provided on the pedal, and the operating part of the pedal lock member is formed so as to contact the pedal at the operating position at positions distributed forward and backward with respect to the pivot axis of the pedal. exists.

0004

[Problems to be Solved by the Invention] However, in the former example of the above-mentioned conventional backhoes, which have a pedal-type operating device that rotates the main boom from side to side, the operator's foot may be accidentally used during work operations. There was a risk that the main boom could rotate unexpectedly if the operator touched the equipment.

Furthermore, in the latter case, when the pedal lock member is closed to the upper part of the pedal, the support of the pedal lock member is unstable.

[0006]

[Means for Solving the Problems] The present invention provides a backhoe having a pedal type actuating device that rotates the main boom from side to side via a swing cylinder. Both ends are formed in an upwardly sloping state, and the left and right pedals are arranged in the left-right direction of the aircraft so that they can swing freely in a see-saw shape around a pivot, and a support bracket is erected on the front side of the pedal-type actuating device. A pedal lock member is rotatably supported on the bracket, and the pedal lock member is configured to freely close the upper part of the pedal-type actuator, and the pedal lock member has a structure that allows the pedal lock member to freely close the upper part of the pedal-type actuator. It is an object of the present invention to provide a pedal lock structure for a pedal type operating device in a backhoe, which is integrally provided with a support body that supports a pedal lock member in contact with the pedal lock member.

[0007]

[Operation] When the main boom is to be rotated left and right by the swing cylinder during excavation work, the pedal lock member is raised upwards and hung vertically, and the left and right pedals of the pedal actuator are selectively stepped on.

[0008] To swing the main boom to the left, the left pedal is stepped on, and conversely, to swing the main boom to the right, the right pedal is stepped on.

[0009] Furthermore, when excavating side ditches during excavation work, or when transporting the machine after excavation work, it is necessary to stop the swing of the main boom. The support body is brought into contact with the floor, and the pedal locking member is placed in a closed position on the upper part of the pedal type actuating device. This makes it impossible to press the left and right pedals.

0010

[Embodiment] A detailed description of an embodiment of the present invention based on the drawings shows a backhoe. The backhoe A has a cabin 2 on the left side of the front of the fuselage frame 1 and an oil tank 3 on the right side of the front. , a prime mover section 4 is provided at the rear of the aircraft, and a bracket 5 is pivotally supported at the front end of the fuselage frame 1 so as to be rotatable left and right. the base end of boom 7, and the secondary boom 7
A bucket 8 is connected to each tip to enable excavation work, and a crawler-type running section 9 is installed below the fuselage frame 1.
It is configured so that it can run.

A swing cylinder 10 is connected to the bracket 5 supporting the base end of the main boom 6, and the swing cylinder 10 is connected to a pedal-type actuator 11 installed in the cabin 2.
The structure is such that the main boom 6 can be rotated left and right through the bracket 5 by being telescopically operated.

The pedal type actuating device 11 is installed on the right side of the front part of the floor 12 of the cabin 2, and the device 11 is connected to left and right pedals 13 and 14 which are integrally connected.
Pivot brackets 15 and 16 are hung from the front and back of the center of the back surface of the floor 1, and the pivot brackets 15 and 16 are
A pivot shaft 19 is mounted between the front and rear support brackets 17 and 18 that protrude from the front and rear support brackets 17 and 18, and is swingably supported on the pivot shaft 19. The rod 20 is installed vertically with the middle part supported by the pivot shaft 19, and the lower end of the rod 20 is interlocked and connected to the hydraulic valve part 22 via the interlocking mechanism 21.
The structure is such that the swing cylinder 10 is telescopically operated via the swing cylinder 10.

The left and right pedals 13 and 14 are each formed into a vertically elongated rectangular plate shape, and have both ends bent upwardly so as to form a V-shape, and their inner ends are integrally connected to each other. Support bodies 13-1 and 14-1 that support a lid-shaped pedal lock member 23 are attached to the pedals 13 and 14-1, respectively, at both ends thereof.
The pedals 13 and 14 are installed perpendicularly to the pedals 13 and 14.
By pressing , the lower end of the operating rod 20 can be rotated to the left and right.

The lid-shaped pedal lock member 23, which is the gist of the present invention, is provided to close the upper portions of the left and right pedals 13, 14, and the pedal lock member 23 is connected to the support body 24. It consists of a lid part 25 and a support body 2.
4 is formed by bending the rear half of a vertically long rectangular plate vertically downward to form an L-shaped side surface, and providing a horizontal part 24-1 and a vertical part 24-2, with the lower end of the vertical part 24-2 being above the floor 12. When in contact with the elastic sheet 26 placed on the left and right pedals 13, 14, the horizontal portion 24-1 forms the upper center ridges of the left and right pedals 13, 14 horizontally in the front-rear direction, and the horizontal portion 24-1 the proximal end,
Support brackets 27, 27 located close to the front side of the pedals 13, 14 are mounted between them via a pivot pin 28,
It is configured to be pivotally supported on the same pivot pin 28 so as to be rotatable rearwardly.

[0015] On the upper side of the horizontal part 24-1, a lid part 25 formed in the shape of a rectangular plate is arranged in a perpendicular manner.
The lid part 25 is formed by bending both sides of the horizontal part 24-1 in an upwardly inclined state from both end positions, and in the closed state, the lower surface of the outer end is connected to the left and right pedals 13, 14. 1
3-1, 14-1 The same pedal 13,
14 is closed from above to prevent the pedals 13 and 14 from swinging.

When the pedal lock member 23 is closed, both ends of the pedal lock member 23 and the left and right pedals 1 are closed.
Both end portions of 3 and 14 overlap in the vertical position.

The embodiment of the present invention is constructed as described above, and when the main boom 6 provided on the backhoe A is rotated from side to side, the interlocking mechanism is activated by operating the pedal type actuating device 11. 21, via the hydraulic valve 22,
The swing cylinder 10 is telescopically operated, and the main boom 6
If the device 11 does not need to be operated, the device 11 can be closed with a lid-like pedal lock member 23. At this time, the pedal lock member 23 is attached to the support body 24.
The base end of the support bracket 27 is pivotally supported at a position close to the front of the left and right pedals 13, 14, and the lower end of the vertical part 24-2 of the support member 24 is supported by an elastic member. When the lid part 25 is rotated toward the front side so as to come into contact with the body seat 26, the lid part 25 comes into contact with the supports 13-1, 14-1 provided on the left and right pedals 13, 14, and
14 from above and the operator's foot accidentally interferes with the pedal lock member 23, the pedal lock member 23 is supported by the vertical portion 24-2 and the support bracket 27, and the pedal 13, 14 is reliably suppressed.

[0018] During excavation work, the swing cylinder 1
When the main boom 6 is to be rotated in the left-right direction by 0, the pedal lock member 23 is raised upward and hung vertically, and the left and right pedals 13 and 14 of the pedal-type actuator 11 are selectively stepped on.

When the main boom 6 is to be rotated to the left, the left pedal 13 is stepped on, and when the main boom 6 is to be rotated to the right, the right pedal 14 is stepped on.

Furthermore, when excavating a side ditch during excavation work, or when transporting the machine after excavation work, it is necessary to stop the swing of the main boom 6. In this case, the pedal lock member 23 must be held in a horizontal position. The vertical part 24-2 is brought into contact with the step part, and the pedal lock member 23 is placed in a closed position above the pedal-type actuating device 11. Then, the left and right pedals 13, 14 cannot be depressed.

According to the above embodiment, the cross-sectional shape of the left and right pedals provided in the pedal-type actuating device is formed such that both ends are inclined upward, and the pedals are arranged in the lateral direction of the aircraft body and swing in a see-saw shape about the pivot axis. Because it is flexible, it is possible to match the direction in which the left and right pedals are stepped on and the rotation direction of the main boom, which prevents erroneous operation of the left and right pedals, allowing backhoe work to be carried out safely and efficiently. It is something that can be done.

Further, a support bracket is provided upright near the pedal-type actuating device, and a lid-like pedal lock member having both ends bent upwardly is rotatably supported on the upper end of the bracket. Since the upper part of the pedal-operated actuator is configured to be able to be closed with the pedal lock member, if the device is not required to be operated, the device can be closed with the pedal lock member while the work is being carried out. This ensures that the danger of the operator's foot accidentally interfering with the device and causing an accident is avoided.

Furthermore, since the left and right pedals and the pedal lock members of the pedal-type actuator are arranged in the left-right direction of the aircraft, the left and right widths are wide, and therefore the left and right pedals can be easily operated by stepping on them. In addition, even when the aircraft makes a sudden turn, the operator can maintain a stable posture by placing his or her feet on the pedal lock member, which has a wide space in the left and right directions.

Furthermore, when the pedal lock member is closed, both ends of the pedal lock member and both ends of the left and right pedals are configured to overlap in the vertical position, so that the operator's foot is not placed on the pedal lock member. Even if you slip and fall, you will not be able to touch the left and right pedals, allowing you to work safely at all times.

[0025] When the operator performs work for a long time, he or she can use the pedal lock member as a footless device by placing his or her feet on the upper surface of the pedal lock member.

[0026]

According to the present invention, the cross-sectional shape of the left and right pedals provided in the pedal-type actuating device is formed such that both ends are inclined upward, and the pedals are disposed in the lateral direction of the aircraft body and swing in a see-saw shape about the pivot axis. Because it is movable, the direction in which the left and right pedals are stepped on can match the direction in which the main boom rotates, which prevents erroneous operation of the left and right pedals, making backhoe work safer and more efficient. It is something that can be done.

Furthermore, since the left and right pedals and the pedal lock member of the pedal-type actuator are arranged in the left-right direction of the aircraft, the left and right widths are wide, and therefore the left and right pedals can be easily operated by stepping on them. In addition, even when the aircraft makes a sudden turn, the operator can maintain a stable posture by placing his or her feet on the pedal lock member, which has a wide space in the left and right directions.

Furthermore, when the pedal lock member is closed, both ends of the pedal lock member and both ends of the left and right pedals are configured to overlap in the vertical position, so that the operator's foot does not rest on the pedal lock member. Even if you slip and fall, you will not be able to touch the left and right pedals, allowing you to work safely at all times.

[0029] When the operator performs work for a long time, he or she can use the pedal lock member as a footless device by placing his or her feet on the upper surface of the pedal lock member.

Further, in the present invention, a support bracket is erected near the pedal type actuating device, a pedal lock member is rotatably supported on the upper end of the bracket, and the pedal lock member is used to lock the support bracket above the pedal type actuating device. In addition to configuring the
The pedal lock member is integrally provided with a support that supports the pedal lock member by coming into contact with the floor when the pedal is closed, so when the pedal is not operated, the pedal lock member can be folded down to prevent pedal operation. The pedal locking member can be placed in a closed position at the top of the device and the support body can be brought into contact with the upper surface of the floor to stably fix the pedal locking member, thereby reliably locking the pedal-type actuating device.

Furthermore, when the driver is working for a long time, he or she can use the pedal lock member as a footless device by placing his or her feet on the upper surface of the pedal lock member.

[Brief explanation of the drawing]

FIG. 1 is a side view of a backhoe having a pedal lock structure of a pedal-type actuating device according to the present invention.

FIG. 2 is an enlarged side view of the main part.

FIG. 3 is an enlarged bottom view of the main parts.

FIG. 4 is an enlarged front view of the main part.

[Explanation of symbols] A Backhoe 6 Main boom 10 Swing cylinder 11 Pedal type actuation device 12th floor 13 Left side pedal 14 Right side pedal 23 Pedal lock member 24-2 Vertical part 27 Support bracket

Claims (1)

[Claims] Claim 1: In a backhoe having a pedal-type actuating device 11 that rotates the main boom 6 from side to side via a swing cylinder 10, the cross-sectional shape of the left and right pedals 13, 14 provided on the pedal-type actuating device 11 is are formed in an upwardly inclined state, and the left and right pedals 13,1
4 is disposed in the left-right direction of the fuselage so that it can freely swing in a see-saw shape about the pivot shaft 19, and a support bracket 27 is installed upright on the front side of the pedal-type actuating device 11, and the bracket 27 has a pedal lock. The member 23 is rotatably supported, and the pedal lock member 23 is configured to freely close the upper part of the pedal type actuating device 11, and the pedal lock member 23 includes:
When closed, the pedal lock member 23 comes into contact with the floor 12.
A pedal lock structure for a pedal-type actuating device in a backhoe, which is integrally provided with a support body 24 that supports the.